What's eating my boskoop glory grape?

Boskoop Glory is a robust outdoor dessert grape popular in UK gardens. Its main threats are birds taking ripe purple berries, wasps excavating bunches, and vine weevil grubs on roots if grown in containers. Powdery mildew stress can predispose vines to leafhopper damage. Bird netting at veraison is the single most important action.

Purple berries pecked and removed from bunches as they ripen; damage concentrates at the top of bunches first; can remove entire clusters Drape fine-mesh netting over the vine canopy at first colour change; secure netting at ground level to prevent birds getting underneath

Ripe berries are hollowed from inside, leaving papery skins; wounds allow secondary grey mould (Botrytis) to infect the whole bunch Bag individual bunches in fine muslin; hang wasp-bait traps with fermented juice away from the vine from mid-summer

C-shaped white grubs chew roots in autumn and winter, especially in container-grown vines; plants wilt suddenly; adults notch leaf margins in summer Apply Steinernema kraussei nematodes to compost in late summer (soil above 5 °C); repot and inspect container roots annually

Pale stippling and bronzing of leaves on vines trained against warm walls or under glass; webbing on undersides Maintain humidity by misting; introduce Phytoseiulus persimilis; insecticidal soap as a fallback